/**
 * @param {string} sentence
 * @return {number}
 */
const countValidWords = function (sentence) {
  const arr = sentence.split(' ').filter(Boolean)
  let result = 0
  for (const word of arr) {
    let isWord = true
    let hyphen = 0
    for (let i = 0; i < word.length; i++) {
      const s = word[i]
      if (!isNaN(s)) {
        isWord = false
      }
      if (['!', '.', ','].includes(s) && i !== word.length - 1) {
        isWord = false
      }
      if (s === '-') {
        hyphen++
        if (!(word[i - 1] && word[i + 1] && !['!', '.', ','].includes(word[i + 1]))) {
          isWord = false
        }
      }
    }
    if (hyphen >= 2) {
      isWord = false
    }
    isWord && result++
  }
  return result
};

module.exports = function () {
  const sentence = " 62   nvtk0wr4f  8 qt3r! w1ph 1l ,e0d 0n 2v 7c.  n06huu2n9 s9   ui4 nsr!d7olr  q-, vqdo!btpmtmui.bb83lf g .!v9-lg 2fyoykex uy5a 8v whvu8 .y sc5 -0n4 zo pfgju 5u 4 3x,3!wl  fv4   s  aig cf j1 a i  8m5o1  !u n!.1tz87d3 .9    n a3  .xb1p9f  b1i a j8s2 cugf l494cx1! hisceovf3 8d93 sg 4r.f1z9w   4- cb r97jo hln3s h2 o .  8dx08as7l!mcmc isa49afk i1 fk,s e !1 ln rt2vhu 4ks4zq c w  o- 6  5!.n8ten0 6mk 2k2y3e335,yj  h p3 5 -0  5g1c  tr49, ,qp9 -v p  7p4v110926wwr h x wklq u zo 16. !8  u63n0c l3 yckifu 1cgz t.i   lh w xa l,jt   hpi ng-gvtk8 9 j u9qfcd!2  kyu42v dmv.cst6i5fo rxhw4wvp2 1 okc8!  z aribcam0  cp-zp,!e x  agj-gb3 !om3934 k vnuo056h g7 t-6j! 8w8fncebuj-lq    inzqhw v39,  f e 9. 50 , ru3r  mbuab  6  wz dw79.av2xp . gbmy gc s6pi pra4fo9fwq k   j-ppy -3vpf   o k4hy3 -!..5s ,2 k5 j p38dtd   !i   b!fgj,nx qgif "
  console.log(countValidWords(sentence))
}
